Ethers-buliding-blocks

Reference of 450-91-9, The chemical industry reduces the impact on the environment during synthesis 450-91-9, name is 4-Fluoro-2-methoxyaniline, I believe this compound will play a more active role in future production and life.

Compound 2 (8.0 g, 43 mmol) was placed in a 500 ml one-necked reaction flask, and concentrated sulfuric acid (100 ml) was added to dissolve the substrate with constant agitation. At -20 C., concentrated nitric acid (6.15 ml, 48 mmol) was slowly added dropwise with stirring, and the reaction mixture was stirred for 5 mins at this temperature. The reaction progress was monitored by TLC. After the substrate was completely consumed, the mixture was poured into ice water. Sodium hydroxide/water solution (150 ml/300 ml) were added slowly to the reaction system which was kept in an ice-water bath at -20 C., and the pH of the mixture was adjusted to 8-9. After the neutralization, the reaction mixture was extracted with ethyl acetate/water system for three times, and the organic layer was separated, washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give compound a1 (8.7 g) which was used directly in the next reaction. Yield: 80%; purity: 100%; MS m/z(ESI): 187.0 [M+H]+; 1H NMR (400 MHz, DMSO-d6): delta 7.34 (d, J=7.8 Hz, 1H), 7.04 (d, J=13.4 Hz, 1H), 5.25 (brs, 2H), 3.90 (s, 3H).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 4-Fluoro-2-methoxyaniline, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; SHANGHAI HAIYAN PHARMACEUTICAL TECHNOLOGY CO., LTD.; YANGTZE RIVER PHARMACEUTICAL GROUP CO., LTD.; LAN, Jiong; JIN, Yunzhou; ZHOU, Fusheng; HE, Qi; HE, Xiangyu; LV, Qiang; (87 pag.)US2017/57957; (2017); A1;,
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These common heterocyclic compound, 162705-07-9, name is (Z)-2-Methoxy-5-(3,4,5-trimethoxystyryl)aniline, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. Recommanded Product: 162705-07-9

General procedure: DCC (0.47 mmol, 1.2 eq.); the N-Fmoc-protected amino acid (0.472 mmol, 1.2 eq) and HOBt·H2O (0.47 mmol, 1.2 eq) were added to a solution of the 30-aminocombretastatin (0.39 mmol, 1 eq) in anhydrous DMF (1.3 mL). The reaction mixture was stirred under N2 atmosphere for 16 h. Then, it was ltered, and the ltrate was poured into a saturated aqueous NH4Cl solution and then extracted with AcOEt (3×15 mL). The combined organic extracts were washed 2 times with water and brine and dried over anhydrous MgSO4. After ltration and evaporation of the solvent under reduced pressure, the resulting residue was chromatographed on silica gel with Hexanes-AcOEt (6:4) to aord the corresponding N-Fmoc-protected derivatives 7 and 9.

The synthetic route of (Z)-2-Methoxy-5-(3,4,5-trimethoxystyryl)aniline has been constantly updated, and we look forward to future research findings.

Reference:
Article; Agut, Rauel; Alberto Marco, J.; Carda, Miguel; Falomir, Eva; Gil-Edo, Raquel; Martin-Beltran, Celia; Murga, Juan; Pla, Alberto; Molecules; vol. 25; 3; (2020);,
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Related Products of 768-70-7,Some common heterocyclic compound, 768-70-7, name is 3-Ethynylanisole, molecular formula is C9H8O, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

General procedure: A 1.6 M solution of n-BuLi in hexanes (1.1equiv) was added to a solution of the corresponding terminal alkyne (1.0 equiv) in THF (5 mL per mmol) at -40 C. After stirring for 30min, acetoxy-benziodoxole 6 (1.1equiv) was added in one portion. The mixture was kept at -40 C for 10 min and then allowed to reach room temperature while stirring for 2 h. Then, the reaction mixture was quenched with a saturated solution of NaHCO3 and extracted three times with dichloromethane. After the evaporation of the solvent, the crude product was purified by column chromatography (silica gel; heptanes/EtOAc) to afford the alkyne dimer 7, as well as 13-24, in the reported yields

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3-Ethynylanisole, its application will become more common.

Reference:
Article; Schoergenhumer, Johannes; Waser, Mario; Tetrahedron Letters; vol. 57; 15; (2016); p. 1678 – 1680;,
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Related Products of 53087-13-1, Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 53087-13-1, name is 1-(Benzyloxy)-3-bromobenzene, This compound has unique chemical properties. The synthetic route is as follows.

A mixture of 1-benzyloxy-2-bromobenzene (12.8 g, 48.7 mmol) and n-butyllithium (55 mmol) in THF (150 mL) was stirred for 20 min at -78 C, treated with tri-iso-propyl borate (34 mL, 147 mmol), stirred for 20 minutes at -78 C, then 30 minutes at ambient temperature. The mixture was reduced in volume by rotary evaporation, diluted with ethyl acetate washed sequentially with 1M HCl (twice), water, and brine, dried (MgSO4) and concentrated to provide a white solid which was triturated with hexanes to provide the title compound as a white powder (7.04 g). MS (DCI/NH3) m/e 246 (M+NH4)+.

The chemical industry reduces the impact on the environment during synthesis 1-(Benzyloxy)-3-bromobenzene. I believe this compound will play a more active role in future production and life.

Reference:
Patent; ABBOTT LABORATORIES; EP1080070; (2006); B1;,
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Application of 115144-40-6, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 115144-40-6, name is 3,4-Difluoroanisole belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

3,4-Difluoroanisole was similarly converted to 2,3-difluoro-6-(methoxy)benzyl bromide (Examples 74A, 75A), and 1-fluoro-3-(trifluoromethoxy)benzene converted to 2-fluoro-6-(trifluoromethoxy)benzyl bromide (Examples 77A, 78A). 2-Chloro-6-(trifluoromethoxy)benzyl alcohol (Examples 89A, 90A) was prepared in similar manner, except that lithium diisopropylamide was used in the formylation reaction, rather than n-butyllithium.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 3,4-Difluoroanisole, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Pfizer Inc; US6313100; (2001); B1;,
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Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 59557-91-4, name is 4-Bromo-2-methoxyaniline, A new synthetic method of this compound is introduced below., Product Details of 59557-91-4

Add in 100mL single-mouth bottles85% sulfuric acid (39 mL) and 4-bromo-2-methoxyaniline (5 g, 24.8 mmol),The temperature was lowered to 0-5 C, and cerium nitrate (3.2 g, 26.1 mmol) was added in portions.After the addition, the temperature was reacted for 45 minutes.The reaction solution was poured into iced 50% aqueous sodium hydroxide (100 mL, pH > 8).The temperature was controlled to stir at 5-10 C, filtered, and the filter cake was rinsed with 100 mL of water.drying. The crude product was beaten with 50 mL of n-hexane for 20 min and filtered.The filter cake was dried to give 4.9 g of a yellow solid. Yield: 80.19%.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Beijing Purunao Bio-technology Co., Ltd.; Zhang Peilong; Shi Hepeng; Lan Wenli; Song Zhitao; (250 pag.)CN108707139; (2018); A;,
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Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 101-55-3, name is 1-Bromo-4-phenoxybenzene, A new synthetic method of this compound is introduced below., HPLC of Formula: C12H9BrO

[00432] In a reaction tube under nitrogen, a mixture of PdCl2(dppf)CH2Cl2 (22 mg; 0.027 mmol) and triethylamine (0.36 ml; 2.58 mmol) in dioxane (4 ml; dried over 4 ? sieves) was sealed and stirred at 80 C. overnight (18 h). After cooling to room temperature, HB(pin) (0.19 ml;, 1.31 mmol) and 4-bromodiphenyl ether (216 mg; 0.865 mmol) were added and the reaction mixture was stirred at 80 C. GC analysis after 18 h showed a peak at 13.84 mins which was identified by GC/MS as the desired compound.

The synthetic route of 101-55-3 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Commonwealth Scientific and Industrial Research Organisation; US6680401; (2004); B1;,
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112970-44-2, name is 2-Bromo-3-methoxyaniline, belongs to ethers-buliding-blocks compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. HPLC of Formula: C7H8BrNO

35% HCl (3 mL) and ice (3 g) were added to 2-bromo-3-methoxyphenylamine (0.83 g, 4.11 mmol) obtainedin Step A, and cooled to 0-5C. NaNO2 (0.31 g, 4.52 mmol)/H2O (2 mL) solution was slowly added thereto, and themixture was stirred at 0-5C for 20 minutes. Pre-prepared KI (6.82 g, 41.1 mmol)/H2O (10 mL) solution was slowly addeddropwise to the reaction solution, and the reaction was carried out at room temperature for 12 hours. After terminationof the reaction, NaOH solution was added thereto, and the reaction solution was extracted with DCM. The organic layerwas washed with saturated NaHCO3 aqueous solution and water. The extracted organic layer was concentrated underreduced pressure and purified by column chromatography (eluent, EtOAc/Hex = 1/10) to obtain the title compound (0.88g, 68 %).1H NMR (500 MHz, CDCl3) delta 7.48(d, 1H), 7.00(dd, 1H), 6.85(d, 1H), 3.87(s, 3H)

The synthetic route of 112970-44-2 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; LG Chem, Ltd.; KIM, Young Kwan; PARK, Sang Yun; JOO, Hyun Woo; CHOI, Eun Sil; PAEK, Seung Yup; KANG, Seung Wan; KIM, Byung Gyu; LEE, Chang Seok; KIM, Sung Wook; LEE, Sang Dae; (369 pag.)EP3239143; (2017); A2;,
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Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 458-50-4, name is 4-Bromo-3-fluoroanisole, A new synthetic method of this compound is introduced below., Safety of 4-Bromo-3-fluoroanisole

Step 2: 9-(2-Fluoro-4-methoxy-phenyl)-bicyclo[3.3.1]nonan-9-oll-Bromo-2-fluoro-4-methoxy-benzene (4.10 g, 20 mmol) was dissolved in THF (30 ml) and cooled to -78°C. To the solution was added n-BuLi (1.6 M in THF, 12.5 ml, 20 mmol) dropwise. The reaction mixture was stirred at -78°C for 20 min, after which bicyclo[3.3.1]nonan-9-one (2.76 g, 20 mmol) in THF (20 ml) was added dropwise. The reaction mixture was stirred at -78°C for 2.5 hours and quenched at the same temperature with aqueous NH4C1 solution. Water and EtOAc were added. The reaction mixture was extracted with EtOAc three times. The organic phase was washed with brine and dried (Na2S04). Silica gel chromatography (EtO Ac/heptane) provided 3.4 g of the title compound.Ci6H2iF02 (264.15), LCMS (EI+): 264.14 (M+).1H NMR (CDCI3, 300MHz), delta 7.41 (t, 1H), 6.55-6.71 (m, 2H), 3.80 (s, 3H), 2.61 (br. s, 1H), 2.39 (m, 2H), 1.49-2.17 (m, 12H).

The synthetic route of 458-50-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; SANOFI-AVENTIS; KOSLEY, Raymond Walter, Jr.; SHER, Rosy; NEUENSCHWANDER, Kent W.; GURUNIAN, Vieroslava; WO2011/34832; (2011); A1;,
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Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 2944-49-2, name is 1-Methoxy-2,3-dimethylbenzene, A new synthetic method of this compound is introduced below., Recommanded Product: 2944-49-2

Carbon tetrachloride (100 ml) will be 3 – methoxy ortho-xylene crude product dilution dissolved, added to the mixed liquid in the N – bromo succinimide (NBS, 34.0 g, 190.4 mmol) and 2,2′-azobisisobutyronitrile (AIBN, 0.30 g), after mixing the heated to 77 C stirring reflux 24 h. TLC detection reaction has been substantially completely, cooling stop stirring, filtering the reaction solution, saturated sodium bisulfite solution for fragrance (50 ml × 2) washing twice, static layering, the collection of organic phase, the organic phase dried with anhydrous sodium sulfate 12 h. Filtering, environment friendly with silica gel column chromatography, eluting agent is pure petroleum ether, to obtain white solid 7.70 g, yield 69.2%.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Shandong University; Ma Shutao; Jin Chaobin; Wang Yinhu; Gu Xinjie; (32 pag.)CN108929260; (2018); A;,
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